Conduit for electric wires.



' 'UNTTED STATES cierren.

' Flinn: n.0. wanswonrn. oF PITTSBURGH, rENNsYLvANIA, AssmNon To ENAMELi METALS coMPANY, or sHAarszeUno, PENNSYLVANIA, A oonronATxoN or PENN- To all whom it may concern:

Be it known that I, FRANK L. O. WADswolrrl-r, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new andnseful Improvement in (londuits for Electric vWires: and I do hereby declare the following to be a full, 'elsa-r,

threads before'enameling, so as t prevent- Athecuamel from entering the threads and also to form a protector for preventing,l damage to the threads during transitto the place where the conduit or pipe is toly' sed. It is the principal object of the pre t inven tion to provide a means for rmitting such a fragile sleeve to be renived quickly when i desired. It is another object of my inven- ,tion to provide a means for enabling.;r a fragile threa dprotector to be removed easily,

which means will be of so simple Aanature as not appreciably lto increase the cost of production of the `thread protected conduit units.

Athread-protector constructed in accord ance with my invention is described, by way of example, in the following specification,

and shown' in the accompanylng drawing. It is to beunderstood, however, that the inventionl may 'be embodied in other ways, and

that changes maybe made in the form described and shown, without exceeding the scope ofthe-invention, as defined in the appended claimen In' the drawing:

Figure 1 is a plan of the end of a conduit i unit provided with a threadprotector constructed in accordance with my invention;

'CONDUIT Fon ELECTRIC WIRES. t

. 4 ,Ivi-,247,756. Specification of Letters Patent. Patented Nov, 27, 1917,

elimination med :une 27, 191s. serial No'. 1oe,13o.

Referring to the drawings, 10 indicates a portion of conduit or other threads 11 at the end thereof. are covered by Aa sleeve 12 formed of fragile material. such as paper, cardboard or-'the like. ,'l`hi s sleeve is placed in positionv before the enameling operation; so that allthos threads which are beneath the sleeve are protected from the enamel, and, when the Pipwhaving 'he. threads sleeve is removed.v these threads are left 65 clean yand ready for the easy lacing of a coupling or the like thereoil w e sleeves 12 are usually left in position during transit, and are removed by the workmen at the last moment. when it is desired to install the 'Hi pipe. In this way the sleeves prevent physi cal damage to the threads during shipment of the pipe from place to place,

It is very desirable that the time taken in removing the protecting sleevesbe reduced J6 to the utmost possible extent. Tothis e. according to my invention, I insert a flexible member between the sleeve. 12 and the threads 11. Then the sleeve is to be removed, the end of thisv flexible member is' 80 osed s form a clip 15 which engages upon the outside of the slevel?.

' 'Ihe wire 13 is put in' place, with the sleeve 12, before the enameling operation. Whenl it is'desired to remove. the sleeve 12, the free.

end 1 4 of the wire 13 is seized and pulled tizi toward the' end of the ipe. The result of this is that the sleeve 12 1s torn along the line of the wire 13, whereupon the sleeve readily,

comes oil' the pipe. The clip 15 at thefend" of thewjre 13 eii'ectually prevents thei wire )ce from-*being pulled through between the sleeve andthe threads, instead of performing' its tearing functions. i

' Fig 2 isa sectional elevation of the same Iny some instances, a metallic cap 16 Y(Fig.` the section being taken on the line 2-2 o 3) is placed over the end of the sleeve12, {et} Fig. `1, 4looking in the direction of the arto prevent'the same from being prematurely rows; and i broken owing to violenttreatment in trenst.

Fig. 3' is n. view similar to Fig. 1, but Tn this case,tl1e wire 13 is putin poslti'on' as before explained, and thereafter the cap 164 is put in place over the clip 15 and the and4 llili showing the thread-prote`ctor as employed in i 55 connection with .a metal1ic cap. 2

of the sleeve l2. When the threads are to exposed, the cap 16 is first torn off andthe sleeve l2 is then removed by ineens of the wire 13, es above explained.

It will readily be seen that the device described enables the protecting sleeve to be removed from the conduit with an expenditure of time so smell as to be inappreciable.

Moreover, this result is accomplished with :nothing more than en ext remel slight additiefe to the cost of applying tie protecting sleeve.

Y Having thus fully described my invention what I claim as new and to secure by Letters Patent is: A

l. The combination with a threaded pipe, sind s. sleeve of reiutively soft material for promoting the threeds thereof. of a flexible member oi relativeiy hard, material inten posed between the threads Y. said sleeve, seid exible member having :tu exposed end extending siting seid pipe and means for preventing seid fiexible member from being pulled through7 between the threads and said sleeve, said meanslmprising a clasp or 25 tion formed by bendin one edof said exible member over and back on said sleeve.

2. The combination':with a, threaded pi e, and a sleeve of relatively soft material or protecting the threads thereof, of a flexible 30 member of relativel hard materiel interposed between the tireeds and said sleeve,` suid fiexible member having an exposed end extending along seid pipe, and means for preventing said exible member from being 35 I pulled through, between the threads and sai sleeve, said means comprising a clasp portion formed by bending one end of said flexible member over and back in contact with said sleeve.

In testimony whereof, I, the said FRANK L. WADsWoR'rH, have hereunto set my han FRANK L.v o. WADSWORTH.

Witnesses:

A. D. P. MILLER, W. C. COOKE. 

